package com.example.demo.api;

import com.example.demo.model.User;
import com.example.demo.model.UserMapper;
import org.springframework.http.HttpRequest;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

/**
 * @Author: 啵啵虎
 * @Date: 2024-05-05  19:57
 */

@RestController
public class UserAPI {

    @Resource
    private UserMapper userMapper;

    @PostMapping("/login")
    @ResponseBody
    public Object login(String username, String password, HttpServletRequest req){
        //关键操作，就是根据username去数据库中进行查询
        //如果能找到匹配的用户，并且密码也一致，就认为登录成功
        User user=userMapper.selectByName(username);
        System.out.println("[login] username="+username);
        if (user==null || !user.getPassword().equals(password)){
            //登录失败
            System.out.println("登录失败！");
            return new User();
        }
        HttpSession httpSession=req.getSession(true);
        httpSession.setAttribute("user",user);
        return user;
    }

    @PostMapping("/register")
    @ResponseBody
    public Object register(String username,String password){
        try {
            User user=new User();
            user.setUsername(username);
            user.setPassword(password);
            userMapper.insert(user);
            return user;
        }catch (org.springframework.dao.DuplicateKeyException e){
            User user=new User();
            return user;
        }
    }

    @GetMapping("/userInfo")
    @ResponseBody
    public Object getUserInfo(HttpServletRequest req){
        try {
            HttpSession httpSession= req.getSession(false);
            User user= (User) httpSession.getAttribute("user");
            //拿着这个user对象，去数据库中找，找到最新的对象
            User newUser=userMapper.selectByName(user.getUsername());
            return newUser;
        }catch (NullPointerException e){
            return new User();
        }
    }
}
